The Indianapolis Colts will start 44-year-old quarterback Philip Rivers against the Seattle Seahawks on Sunday, a league source told The Athletic. Rookie sixth-round pick Riley Leonard will be his backup.

The Colts might look a little different because they might be trotting out 44-year-old future Hall of Fame quarterback Philip Rivers under center. Regardless of the shock surrounding the Colts, the Seahawks have to take care of business in a must-win game.

Philip Rivers ' return to the gridiron is being fast-tracked, as the Indianapolis Colts will start the 44-year-old at quarterback for their Week 15 road matchup against the Seattle Seahawks, according to NFL Network. Rivers ended his five-year retirement on Tuesday, signing with the Colts practice squad. Now, he's once again a starting quarterback.

Philip Rivers is set to join the Indianapolis Colts' 53-man roster ahead of Sunday's game against the Seattle Seahawks and will start, according to multiple reports.

The Colts have elevated the newly unretired quarterback from the practice squad to the 53-man active roster Saturday, making him officially eligible to play Sunday against the Seahawks.

How will the improbable return of Philip Rivers with the Indianapolis Colts play out against the Seattle Seahawks?

The Seattle Seahawks have announced the names that will serve as captains in a crucial matchup against the Indianapolis Colts on Sunday. Crucial in that the Hawks seek to keep pace with the best record in the National Football Conference and the fight for the #1 seed.